Oil filter and renewable cartridge



March 8, 1949. H P, WEST 2,463,929

OIL FILTER AND RENEWABLE CARTRIDGE Filed Nov. 8, 1945 UU... ,L

Herman lPaul Wes 1NVENT0R.

BY M'WMW Patented Mar. 8, 1949 UNITED STATES PATENT GFFICE 2 Claims. l

My invention as described herein. and illustrated in the accompanying drawings, consists of an oil filter, an object of which is to provide a filter for internal combustion engines having a removable filter cartridge whereby a new cartridge may be substituted when necessary for one which has become clogged and is further useless.

Another object of my invention is to provide a renewable filter cartridge.

A further object of this invention is to provide a permanent filter casing adapted to receive therein renewal filter cartridges from time to time as required.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure 1 is a vertical sectional elevational view of a cartridge and container,

Figure 2 is a perspective view of a rell cartridge.

Figure 3 is a top plan view of Figure l, and

Figure 4 is a sectional elevational view of my filter.

While one embodiment of my invention is illustrated in the above referred to drawings, it is to be understood that they are merely for the purpose of illustration and that various changes in construction may be resorted to in the course of manufacture in order that the invention may be utilized to the best advantage according to circumstances which may arise, without in any way departing from the spirit and intention of my device. And while I have stated the primary eld of utility of my invention it remains obvious that it may be employed in any other capacity wherein it may be found applicable.

In the accompanying drawings, and in the following specification, the same reference characters are used to designate the same parts and elements throughout. The device includes a filter casing I I having an inlet pipe I2, through its bottom wall I3, which is preferably dome shaped. The upper end I4, of the casing is provided with a dome-shaped cap I5, engaged with the flange I6 of said end I4, by means of its flange I1. The casing is provided with an outlet port I8 which with pipe I2, is connected with an oiling system of an internal combustion engine or other oil pressure lubricating system.

Seated upon the upper end I9 of the pipe I2 is a container 20, within which is seated a renewable oil filter element 2 I. Extending completely through the center of the container is a tube 22, the lower end 23 of which is adapted to seat upon a flange 24 on said end I9. The cap I5 closes the upper end of the casing I I and is provided with a centrally disposed inwardly projecting member 25, having a head 26, adapted to seat over and tightly close the upper end 21, of tube 22.

'Ihe tube 22 is perforated throughout its length except within about an inch or two of its ends 23 and 21. The bottom wall 28, of the container is solid except for the opening for the tube 22. Spaced above wall 28, and surrounding the tube 22, is a perforated wall 29, which forms a seat for the lower end 30, of the filter element 2 I, and between said walls 28 and 29, is a trap space 3l, for sludge or water which may seep down through the lter.

Connected to the top 32, of container 20, by bayonet joints or otherwise is a cap ring 33, having an upper annular flange 34 and a top wall 31 which seats upon a ne screen 36 which, in

turn, seats upon the upper end 35 of the cartridge element 2|, the screen 36 and top wall 31 being centrally apertured to receive the upper end 21, of the tube 22. The wall 31 is perforated throughout as indicated at 38. The ring 33, is provided` with a bail 39, by means of which the container 20, may be lifted from the casing II, for the purpose of changing cartridges. This bail is of a diameter to fold down within the flange 34.

A spacer ring 40, integral with the top wall 31,'

is provided around the upper end 2'I of tube 22 to provide oil space 4I', between the tube and the inner wall 42 of refill cartridge element 2|. The diameter of the container 20, is less than that of casing II, in order to provide suflicient space 43, for oil flow between said members.

The filter cartridge element 2|, is formed of an elongated filter cloth 44, laid out flat and filter material such as cotton and cotton waste 45, is laid thereon, then ground mica of fullers earth or both are sprinkled over the surface of the material, then edges 46, of the cloth are folded over upon said material 45, a perforated tube 41 placed upon one end of the pad so formed and the latter rolled upon said tube 22 until the outer convolution 49, is of a diameter to snugly fill in the interior space of the container. The tube 41 is of a diameter to slip freely over tube 22 of the container. Three quarter offset ring flanges 5I and 52 are provided on the outer surfaces of the upper and lower walls 31 and 28 within which resilient centrally apertured gaskets 53 and 54 may be forced by slightly bending the gaskets when pushing them into the anges 3| and 52. These gaskets 53 and 54 seal the pipe I2 to the lower end oi the tube 22 and seal the upper end of the tube 22 to the upper wall 31.

In operation, oil under pressure enters tube 22, from pipe I2, flows up the tube 22 and through perforations 55 therein, into space 4l', then through perforated tube 41, filter cartridge element 2|, up through screen 36, the perforated wall 31, and thence over the ange 34 of ring 33,

into space 43, from where the filtered oil passes out through port i8. In space 4I, heavier particles of debris and water lwill settle to the bottom 51, of that space and finally pass through the lower portion of the filter 2|, *and through the perforated wall 29, into the sludge trap 3I. The clarified oil from the filter passes through the top of the container and any water or fine particles of debris which may have escaped the filter will settle down into the cavity 59, in the lower end 60, of the casing I I, where it will remain until cleaned out when container 20, is removed for a refill filter. As there is no liquid flow or current in said cavity the sludge or water which may settle therein can not again intermingle with oil passing through the filter casing.

It is thought that persons skilled in the art to which'the invention relates will be able to obtain a clear understanding of the invention after'considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described my invention, that which I claim as new and desire to procure by Letters Patent is:

1. An oil filter comprising a casing having an inlet pipe and an outlet and a removable cap having an inwardly projecting member, a filter container removably supported within said casing by and between said inlet tube and said projecting member, gaskets sealing said container to said inlet tube and projecting member, and a filter cartridge element within said filter container, said container being spaced from said casing, said cartridge comprising spirally wound filtering material on a perforated tube, and said container including a perforated tube spaced from anId substantially coextensive with said first-mentioned perforated tube.

2. An oil filter comprising a casing having an inlet pipe and an outlet and a removable cap having an inwardly projecting member, a filter container removably supported within said casing by and between said inlet tube and said pro-iA jecting member, gaskets sealing said container to said inlet tube and projecting member, and a jecting member, said upper wall and said lower imperforate wall having offset ring iianges for removably receiving said gaskets.

HERMAN PAUL WEST.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,083,546 Aldham June 15, 1937 2,128,589 Manning Aug. 30, 1938 2,197,471 Hooper Apr. 16, 1940 2,221,465 Aldham Nov. 12, 1940 2,280,033 Aldham Apr. 14, 1942 2,321,985 Briggs June 15, 1943 2,364,617 Bolser Dec. 12, 1944 2,369,857 Russell et al Feb. 20, 1945 

